J/ApJ/497/330 Candidate main-sequence stars (Mannings+, 1998)
Candidate main-sequence stars with debris disks:
a new sample of Vega-like sources.
Mannings V., Barlow M.J.
<Astrophys. J. 497, 330 (1998)>
=1998ApJ...497..330M 1998ApJ...497..330M (SIMBAD/NED BibCode)
ADC_Keywords: Stars, dwarfs ; Infrared sources ; Spectra, infrared
Keywords: circumstellar matter - infrared: stars
Abstract:
Vega-like sources are main-sequence stars that exhibit IR fluxes in
excess of expectations for stellar photospheres, most likely due to
reradiation of stellar emission intercepted by orbiting dust grains.
We have identified a large sample of main-sequence stars with possible
excess IR radiation by cross-correlating the Michigan Catalog of
Two-dimensional Spectral Types for the HD Stars with the IRAS Faint
Source Survey Catalog. Some 60 of these Vega-like sources were not
found during previous surveys of the IRAS database, the majority of
which employed the lower sensitivity Point Source Catalog. Here, we
provide details of our search strategy, together with a preliminary
examination of the full sample of Vega-like sources.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 122 73 Newly identified candidate main-sequence
stars with debris disks
table3.dat 122 35 Michigan Spectral Catalogue Vega-like stars identified
with in our search and in previous studies
table4.dat 122 12 Vega-like candidates with uncertain
luminosity classification
table5.dat 122 21 Classical Be stars extracted during our search
for Vega-like sources
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See also:
II/156 : IRAS Faint Source Catalog, |b| > 10, Version 2.0 (Moshir+ 1989)
III/31 : Michigan catalogue for the HD stars, vol. 1 (Houk+, 1975)
III/51 : Michigan Catalogue of HD stars, Vol.2 (Houk, 1978)
III/80 : Michigan Catalogue of HD stars, Vol.3 (Houk, 1982)
III/133 : Michigan Catalogue of HD stars, Vol.4 (Houk+, 1988)
Byte-by-byte Description of file: table*.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Number Object number
3- 5 A3 --- n_Number [abcdefghij ] Note on Number (1)
7- 12 I6 --- HD HD (Cat. III/135) number
14- 19 I6 --- SAO ? SAO (Cat. I/131) number
21- 24 I4 --- HR ? HR (Cat. V/50) number
26- 34 A9 --- Name Object name
36- 48 A13 --- SpType Spectral type
50- 53 I4 --- Fqual Quality flag of the IRAS bands
55- 60 F6.3 Jy F12um FSC (Cat. II/156) flux density at 12µm
62- 66 F5.3 Jy e_F12um rms uncertainty on F12um
68- 73 F6.3 Jy F25um FSC (Cat. II/156) flux density at 25µmm
75- 79 F5.3 Jy e_F25um rms uncertainty on F25um
81- 86 F6.3 Jy F60um FSC (Cat. II/156) flux density at 60µmm
88- 92 F5.3 Jy e_F60um rms uncertainty on F60um
94- 99 F6.3 Jy F100um FSC (Cat. II/156) flux density at 100µmm
101-106 F6.3 Jy e_F100um rms uncertainty on F100um
108-114 F7.2 --- D(12/25)/dobs Discrepancy for 12µm/25µm ratio (2)
116-122 F7.2 --- D(25/60)/dobs Discrepancy for 25µm/60µm ratio (2)
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Note (1): a: Flagged by SIMBAD as a double or multiple star
b: Flagged by SIMBAD as a variable star
c: Has a K4 companion star (Corbally, 1984ApJS...55..657C 1984ApJS...55..657C)
e: Member of stellar cluster
f: λ Boo star (e.g., King, 1994MNRAS.269..209K 1994MNRAS.269..209K)
g: Classed as Herbig Ae star by Finkenzeller & Mundt
(1984A&AS...55..109F 1984A&AS...55..109F)
h: Located in R CrA star-forming region
i: Member of Sco-Cen OB association (e.g., de Geus, de Zeeuw, &
Lub, 1989A&A...216...44D 1989A&A...216...44D)
j: Not identified in previous surveys of the IRAS database
Note (2): Measure of the significance of the discrepancies between the observed
flux density ratios and the expected photospheric values, as defined
in eqs. (5) and (6).
A null entry signifies inadequate data quality
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History: From ApJ electronic version
(End) James Marcout, Patricia Bauer [CDS] 16-Jun-1998